BPV Size Issues

[pwdunmore]

Some of you may know I already installed my 3.5'' JBR Widepath intake and right now it is so close to the stock (OEM) BPV that the rubber around the filter is actually coming into contract with the top of the BPV.

It's not rubbing against any of the filter component because I spaced it out enough with washers on the mounting bracket but I want to get a new BPV so the contact is eliminated.

The stock BPV is just over 3'' inches tall from what I just measured now at work lol... might be a little off so don't shoot me.

Anyone know of any small BPV's that I could use to stop this issue?

Cobb XLE is 3.5'' from top of the adjustment bolt to the bottom of the flange.

Anyone know the height of the forge v2's?

Looked around MSF and searched for measurements for a while, just I think the guys with the BPV's installed would know what's best.

[S.F.W.]

Check out the Turbosmart Kompact edition. I think it is one of the smaller solution on the market.
http://www.turbosmartusa.com/product/kompact-dual-port-universal-fit . If you can come to the Masiv meet on Monday, you can take a look at mine in person.

[pwdunmore]

The turbo smart sizing might work but it's still gonna be close :( I'll have to come out monday to see how it fits in the car.

The shape of the forge might be my best bet to lose the contact too. I can't find the dimensions for it anywhere though... Cobb and Turbo smart actually give you measurements!

[boyracer]

I'll be there on Monday, you can take a peek at the forge and compare.

[rzapata]

Ask Someguy. I think he has a forge v2. Or maybe ask Rick as well. Maybe he can do you a favour and measure the bpv itself.

Edit:

Boyracer's offer is much better. :)

[loki]

the stock BPV is really small to begin with.

good luck

[pwdunmore]

the stock BPV is really small to begin with.

good luck

I know... might have to go the expensive route and get the HTP battery tray and new battery. I just a little scared of the idea of not having enough CCA to get my car going since I would be downsizing the battery. Anyone have bad experiences with the smaller batteries in the winter? or do you think 500 CCA will be enough to get her going?

[loki]

I know... might have to go the expensive route and get the HTP battery tray and new battery. I just a little scared of the idea of not having enough CCA to get my car going since I would be downsizing the battery. Anyone have bad experiences with the smaller batteries in the winter? or do you think 500 CCA will be enough to get her going?

all the mspeed guys will be running the smaller batteries. If they're not worried, I don't think you should be.

[pwdunmore]

So I installed a Forge V2 BPV because it is the smalled in height in comparison to all the other BPV and I have wiggle room around the intake and BPV now.

One problem is I have the Yellow spring in right now and I greased the inside of the BPV but I am getting a flutter from when releasing the pressure... I think it might be the valve not opening fast enough or something.

I get up to target PSI's and I know people say use the blue spring but I tried that and it didn't help at all obviously.

The valve open and closes when I push it in with my finger and at low psi I don't get the sound. Think it could be a sticky BPV?

What did I **** up?

[Fack_Dude]

So I installed a Forge V2 BPV because it is the smalled in height in comparison to all the other BPV and I have wiggle room around the intake and BPV now.

One problem is I have the Yellow spring in right now and I greased the inside of the BPV but I am getting a flutter from when releasing the pressure... I think it might be the valve not opening fast enough or something.

I get up to target PSI's and I know people say use the blue spring but I tried that and it didn't help at all obviously.

The valve open and closes when I push it in with my finger and at low psi I don't get the sound. Think it could be a sticky BPV?

What did I **** up?

try the shims that comes with the bpv or a stiffer spring.

[SomeGuy]

So I installed a Forge V2 BPV because it is the smalled in height in comparison to all the other BPV and I have wiggle room around the intake and BPV now.

One problem is I have the Yellow spring in right now and I greased the inside of the BPV but I am getting a flutter from when releasing the pressure... I think it might be the valve not opening fast enough or something.

I get up to target PSI's and I know people say use the blue spring but I tried that and it didn't help at all obviously.

The valve open and closes when I push it in with my finger and at low psi I don't get the sound. Think it could be a sticky BPV?

What did I **** up?

You should be using the blue spring...make sure that you didn't over do it with the grease, you only need a bit...and finally check the vacuum line to make sure it's not leaking.

And yes, the forge v2 is lower profile (I'm a little late to the party lol).

[pwdunmore]

try the shims that comes with the bpv or a stiffer spring.

I will when I get home today, I played around with the blue spring with 0, 1 and 2 shims. All got the same sound of the fluttering sound.

I know it should sound close to the stock one and the backpressure of air hitting the fan blades is definately what the problem is. I am gonna try cleaning it out again and regreasing around the O-rings. Maybe it a little sticky and just doesn't want to break open at first, the spring and valve move up and down so it's not stuck closed.

I will play around with the Yellow and Blue spring with shims today. I am targetting 17psi if that's useful information.

[pwdunmore]

You should be using the blue spring...make sure that you didn't over do it with the grease, you only need a bit...and finally check the vacuum line to make sure it's not leaking.

And yes, the forge v2 is lower profile (I'm a little late to the party lol).

Better late then never, thanks for the help. What's the best way to check that vacuum line?

[Fack_Dude]

Better late then never, thanks for the help. What's the best way to check that vacuum line?

start off with a heavier spring first.

[pwdunmore]

start off with a heavier spring first.

I thought that was opposite of what I want? Can you explain?

I read on MSF that the flutter means I have a sticky valve or spring that is too stiff, since I am using the Yellow spring which is entirely in the range of my boost you would think it wouldn't be the spring at all. A valve leaking boost because it can't hold the psi wouldn't cause a flutter from the surge of backpressure it would just leak.

[Fack_Dude]

I thought that was opposite of what I want? Can you explain?

I read on MSF that the flutter means I have a sticky valve or spring that is too stiff, since I am using the Yellow spring which is entirely in the range of my boost you would think it wouldn't be the spring at all. A valve leaking boost because it can't hold the psi wouldn't cause a flutter from the surge of backpressure it would just leak.


Sorry, its been awhile since I had my forge. Try a blue spring with 2 shims first.

[rzapata]

I read that it's better if you use a non viscous fluid as your lubricant, not grease. Grease tends to become sticky. Not sure how the forge valve works but with my turbosmart bpv, I used engine oil instead. If that works then good. If not, we'll figure it out somehow.

Also, are you sure that you're actually hearing flutter?

[pwdunmore]

I read that it's better if you use a non viscous fluid as your lubricant, not grease. Grease tends to become sticky. Not sure how the forge valve works but with my turbosmart bpv, I used engine oil instead. If that works then good. If not, we'll figure it out somehow.

Also, are you sure that you're actually hearing flutter?

I build boost up and right after the BPV is suppose to go off when letting off the throttle it doesn't have that distinct blow off sound that I know it should have. I will give it a couple of rips down the road at lunch a record/upload it if it helps. The stock BPV didn't have the noise of "the fluttering" at all and let off the sound of air being released back into the TIP.

I wish things just worked perfectly the first time lol...

[rzapata]

Yup post a video. What's your boost target by the way? Take it easy on boost because if it really is turbo flutter, that can mess up the turbo.

[pwdunmore]

Yup post a video. What's your boost target by the way? Take it easy on boost because if it really is turbo flutter, that can mess up the turbo.

I will post two video when I get home. When I rev the engine in neutral at a stand still I can hear the BPV go off with no fluttering sound but when I drive is sound like air going through the fins of the turbo.


While driving around:
sounds like "RRRRRRRRRRRRRRRRRRRRRRRR FLUTUTUTUTUTUTUT"

While at a stand still:
sounds like "RRRRRRRRRRRRRRRRRRRRRRRRR PSSHHHHHHUUU"

I'll update this post when I get home to add the videos... :(

[loki]

I will post two video when I get home. When I rev the engine in neutral at a stand still I can hear the BPV go off with no fluttering sound but when I drive is sound like air going through the fins of the turbo.


While driving around:
sounds like "RRRRRRRRRRRRRRRRRRRRRRRR FLUTUTUTUTUTUTUT"

While at a stand still:
sounds like "RRRRRRRRRRRRRRRRRRRRRRRRR PSSHHHHHHUUU"

I'll update this post when I get home to add the videos... :(

just post a video. that was a terrible description.

[loki]

sounds like BPV fluttering.

my car does it.

Mr Wilson loves it

[Mr Wilson]

Do I ever, that and bus brakes!

[pwdunmore]

just post a video. that was a terrible description.

What causes your fluttering?

you don't like my phonetic description lol :P I'll post the videos, way easier...

Just to get my logic side of my brain going, so if my valve is staying shut I would see a boost spike or go into vacuum?

[2zoom]

Make sure also the small hose is not pinched in any way. That would also cause the flutter.

[pwdunmore]

Make sure also the small hose is not pinched in any way. That would also cause the flutter.

AND THE WINNER IS 2ZOOM! lmao... it was being pinched under the shroud and never noticed it... damn vacuum lines. Just went for a drive and all is well is mazdaspeed land :) I'm using the yellow spring with no shims and I hold up to 17 psi np :) Gonna play around with this on the weekend to see what setup holds best. I think I will hop on the Blue Spring band wagon once I get some free time to take things apart.

Thanks for all the help guys! I think I will swing by on the Masiv meet on monday since I am just down the road :)

I'll post the videos so people have some references to know what a to listen for.


http://www.youtube.com/watch?v=5XF4Rnn-6xo&feature=plcp


http://www.youtube.com/watch?v=f6LKCdxorh4&feature=plcp

[2zoom]

Glad to hear it worked out bud.

[rzapata]

Good stuff. Glad it's fixed now. And yeah, turbo flutter doesn't sound like that. :)